Sorry for the late reply, i'm new here and heven't seen this post. There is already a remaster with captive (and other cool stuff), find it at:

ftp://ftp.bitdefender.com/pub/linux/free/LinuxDefender/

Features are:

* BitDefender SMTP-proxy AV scanner and anti-spam
* Webmin administration console for it.
* On-demand scanner (cmd line and GTK interface) - just right click a folder.
* ntfs write support (using captive)

Enjoy